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authorMauro Carvalho Chehab <mchehab@redhat.com>2013-03-20 06:15:45 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2013-03-21 10:26:50 -0300
commit8f3741e02831d1181be9ca0ea711dd0c8d7f8a7b (patch)
treed7b262cec4ea88ce491fb9f937b62ae335825835 /drivers/media/dvb-frontends
parent2b0e1f3afda10dfc33a6bdae07caa24b906d1114 (diff)
downloadvexpress-lsk-8f3741e02831d1181be9ca0ea711dd0c8d7f8a7b.tar.gz
[media] drxk: Add pre/post BER and PER/UCB stats
The original az6007 driver has the code to calculate such stats. Add it to the driver, reporting them via DVBv5 stats API. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/dvb-frontends')
-rw-r--r--drivers/media/dvb-frontends/drxk_hard.c179
-rw-r--r--drivers/media/dvb-frontends/drxk_hard.h2
-rw-r--r--drivers/media/dvb-frontends/drxk_map.h3
3 files changed, 172 insertions, 12 deletions
diff --git a/drivers/media/dvb-frontends/drxk_hard.c b/drivers/media/dvb-frontends/drxk_hard.c
index 0e40832a9a5..8c4de7cc450 100644
--- a/drivers/media/dvb-frontends/drxk_hard.c
+++ b/drivers/media/dvb-frontends/drxk_hard.c
@@ -2655,11 +2655,6 @@ static int GetDVBTSignalToNoise(struct drxk_state *state,
c = Log10Times100(SqrErrIQ);
iMER = a + b;
- /* No negative MER, clip to zero */
- if (iMER > c)
- iMER -= c;
- else
- iMER = 0;
}
*pSignalToNoise = iMER;
@@ -6380,31 +6375,165 @@ static int drxk_set_parameters(struct dvb_frontend *fe)
fe->ops.tuner_ops.get_if_frequency(fe, &IF);
Start(state, 0, IF);
+ /* After set_frontend, stats aren't avaliable */
+ p->strength.stat[0].scale = FE_SCALE_RELATIVE;
+ p->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ p->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ p->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ p->pre_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ p->pre_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ p->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ p->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+
/* printk(KERN_DEBUG "drxk: %s IF=%d done\n", __func__, IF); */
return 0;
}
-static int drxk_read_status(struct dvb_frontend *fe, fe_status_t *status)
+static int drxk_get_stats(struct dvb_frontend *fe)
{
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
struct drxk_state *state = fe->demodulator_priv;
+ int status;
u32 stat;
-
- dprintk(1, "\n");
+ u16 reg16;
+ u32 post_bit_count;
+ u32 post_bit_err_count;
+ u32 post_bit_error_scale;
+ u32 pre_bit_err_count;
+ u32 pre_bit_count;
+ u32 pkt_count;
+ u32 pkt_error_count;
+ s32 cnr, gain;
if (state->m_DrxkState == DRXK_NO_DEV)
return -ENODEV;
if (state->m_DrxkState == DRXK_UNINITIALIZED)
return -EAGAIN;
- *status = 0;
+ /* get status */
+ state->fe_status = 0;
GetLockStatus(state, &stat, 0);
if (stat == MPEG_LOCK)
- *status |= 0x1f;
+ state->fe_status |= 0x1f;
if (stat == FEC_LOCK)
- *status |= 0x0f;
+ state->fe_status |= 0x0f;
if (stat == DEMOD_LOCK)
- *status |= 0x07;
+ state->fe_status |= 0x07;
+
+ if (stat >= DEMOD_LOCK) {
+ GetSignalToNoise(state, &cnr);
+ c->cnr.stat[0].svalue = cnr * 100;
+ c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
+ } else {
+ c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ }
+
+ if (stat < FEC_LOCK) {
+ c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ c->pre_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ c->pre_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ return 0;
+ }
+
+ /* Get post BER */
+
+ /* BER measurement is valid if at least FEC lock is achieved */
+
+ /* OFDM_EC_VD_REQ_SMB_CNT__A and/or OFDM_EC_VD_REQ_BIT_CNT can be written
+ to set nr of symbols or bits over which
+ to measure EC_VD_REG_ERR_BIT_CNT__A . See CtrlSetCfg(). */
+
+ /* Read registers for post/preViterbi BER calculation */
+ status = read16(state, OFDM_EC_VD_ERR_BIT_CNT__A, &reg16);
+ if (status < 0)
+ goto error;
+ pre_bit_err_count = reg16;
+
+ status = read16(state, OFDM_EC_VD_IN_BIT_CNT__A , &reg16);
+ if (status < 0)
+ goto error;
+ pre_bit_count = reg16;
+
+ /* Number of bit-errors */
+ status = read16(state, FEC_RS_NR_BIT_ERRORS__A, &reg16);
+ if (status < 0)
+ goto error;
+ post_bit_err_count = reg16;
+
+ status = read16(state, FEC_RS_MEASUREMENT_PRESCALE__A, &reg16);
+ if (status < 0)
+ goto error;
+ post_bit_error_scale = reg16;
+
+ status = read16(state, FEC_RS_MEASUREMENT_PERIOD__A, &reg16);
+ if (status < 0)
+ goto error;
+ pkt_count = reg16;
+
+ status = read16(state, SCU_RAM_FEC_ACCUM_PKT_FAILURES__A, &reg16);
+ if (status < 0)
+ goto error;
+ pkt_error_count = reg16;
+ write16(state, SCU_RAM_FEC_ACCUM_PKT_FAILURES__A, 0);
+
+ post_bit_err_count *= post_bit_error_scale;
+
+ post_bit_count = pkt_count * 204 * 8;
+
+ /* Store the results */
+ c->block_error.stat[0].scale = FE_SCALE_COUNTER;
+ c->block_error.stat[0].uvalue += pkt_error_count;
+ c->block_count.stat[0].scale = FE_SCALE_COUNTER;
+ c->block_count.stat[0].uvalue += pkt_count;
+
+ c->pre_bit_error.stat[0].scale = FE_SCALE_COUNTER;
+ c->pre_bit_error.stat[0].uvalue += pre_bit_err_count;
+ c->pre_bit_count.stat[0].scale = FE_SCALE_COUNTER;
+ c->pre_bit_count.stat[0].uvalue += pre_bit_count;
+
+ c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
+ c->post_bit_error.stat[0].uvalue += post_bit_err_count;
+ c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
+ c->post_bit_count.stat[0].uvalue += post_bit_count;
+
+ /*
+ * Read AGC gain
+ *
+ * IFgain = (IQM_AF_AGC_IF__A * 26.75) (nA)
+ */
+ status = read16(state, IQM_AF_AGC_IF__A, &reg16);
+ if (status < 0) {
+ printk(KERN_ERR "drxk: Error %d on %s\n", status, __func__);
+ return status;
+ }
+ gain = 2675 * (reg16 - DRXK_AGC_DAC_OFFSET) / 100;
+
+ /* FIXME: it makes sense to fix the scale here to dBm */
+ c->strength.stat[0].scale = FE_SCALE_RELATIVE;
+ c->strength.stat[0].uvalue = gain;
+
+error:
+ return status;
+}
+
+
+static int drxk_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+ struct drxk_state *state = fe->demodulator_priv;
+ int rc;
+
+ dprintk(1, "\n");
+
+ rc = drxk_get_stats(fe);
+ if (rc < 0)
+ return rc;
+
+ *status = state->fe_status;
+
return 0;
}
@@ -6439,6 +6568,10 @@ static int drxk_read_snr(struct dvb_frontend *fe, u16 *snr)
return -EAGAIN;
GetSignalToNoise(state, &snr2);
+
+ /* No negative SNR, clip to zero */
+ if (snr2 < 0)
+ snr2 = 0;
*snr = snr2 & 0xffff;
return 0;
}
@@ -6522,6 +6655,7 @@ static struct dvb_frontend_ops drxk_ops = {
struct dvb_frontend *drxk_attach(const struct drxk_config *config,
struct i2c_adapter *i2c)
{
+ struct dtv_frontend_properties *p;
struct drxk_state *state = NULL;
u8 adr = config->adr;
int status;
@@ -6602,6 +6736,27 @@ struct dvb_frontend *drxk_attach(const struct drxk_config *config,
} else if (init_drxk(state) < 0)
goto error;
+
+ /* Initialize stats */
+ p = &state->frontend.dtv_property_cache;
+ p->strength.len = 1;
+ p->cnr.len = 1;
+ p->block_error.len = 1;
+ p->block_count.len = 1;
+ p->pre_bit_error.len = 1;
+ p->pre_bit_count.len = 1;
+ p->post_bit_error.len = 1;
+ p->post_bit_count.len = 1;
+
+ p->strength.stat[0].scale = FE_SCALE_RELATIVE;
+ p->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ p->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ p->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ p->pre_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ p->pre_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ p->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ p->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+
printk(KERN_INFO "drxk: frontend initialized.\n");
return &state->frontend;
diff --git a/drivers/media/dvb-frontends/drxk_hard.h b/drivers/media/dvb-frontends/drxk_hard.h
index d18a896a983..b8424f15f9a 100644
--- a/drivers/media/dvb-frontends/drxk_hard.h
+++ b/drivers/media/dvb-frontends/drxk_hard.h
@@ -345,6 +345,8 @@ struct drxk_state {
bool antenna_dvbt;
u16 antenna_gpio;
+ fe_status_t fe_status;
+
/* Firmware */
const char *microcode_name;
struct completion fw_wait_load;
diff --git a/drivers/media/dvb-frontends/drxk_map.h b/drivers/media/dvb-frontends/drxk_map.h
index 23e16c12f23..761613f9fd5 100644
--- a/drivers/media/dvb-frontends/drxk_map.h
+++ b/drivers/media/dvb-frontends/drxk_map.h
@@ -10,6 +10,7 @@
#define FEC_RS_COMM_EXEC_STOP 0x0
#define FEC_RS_MEASUREMENT_PERIOD__A 0x1C30012
#define FEC_RS_MEASUREMENT_PRESCALE__A 0x1C30013
+#define FEC_RS_NR_BIT_ERRORS__A 0x1C30014
#define FEC_OC_MODE__A 0x1C40011
#define FEC_OC_MODE_PARITY__M 0x1
#define FEC_OC_DTO_MODE__A 0x1C40014
@@ -129,6 +130,8 @@
#define OFDM_EC_SB_PRIOR__A 0x3410013
#define OFDM_EC_SB_PRIOR_HI 0x0
#define OFDM_EC_SB_PRIOR_LO 0x1
+#define OFDM_EC_VD_ERR_BIT_CNT__A 0x3420017
+#define OFDM_EC_VD_IN_BIT_CNT__A 0x3420018
#define OFDM_EQ_TOP_TD_TPS_CONST__A 0x3010054
#define OFDM_EQ_TOP_TD_TPS_CONST__M 0x3
#define OFDM_EQ_TOP_TD_TPS_CONST_64QAM 0x2